The Windmill that's not a windmill

I just read this evening about a new windmill from QR5 that spins vertically instead of horizontally. What I found amazing is that it doesn't kill birds, which was one of the major complaints against the 'propellor' type. Apparently a flock of birds will see it and go round it!

I read it in David MacKay's new amazing book about sustainable energy. This is the most serious work I have ever seen on the subject, and one that seems destined to become the "bible" of the subject. His science is so solid that I can't see anyone really arguing with him... he is likely to crush them into a pile of dust!!

Anyway here's the link to his sustainable energy book. (no affiliation) It's available free online and you should check it out.

There's a pic of the windmill in p.267 of the book, which is the page I linked.

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